An adhesive spacer layer and a semi-reflective layer are used for multi-layer discs. In BD-RE discs, the data layers are surrounded by a pair of dielectric Zinc Sulfur-Silicon Dioxide layers. Melting the material with a very high power beam turns it into an amorphous state with low reflectivity, while heating at a lower power erases it back to a crystalline state with high reflectivity. Similar to CD-RW and DVD-RW, a phase transition alloy (often GeSbTe or InAgTeSb, Copper silicate (CuSi) or other alloys can also be used, like Verbatim's proprietary MABL) is used for BD-RE discs. A pair of layers with copper alloy and silicon that combines on recording may alternatively be used. Composites used may include BiN, Ge 3N 4, and Pd-doped tellurium suboxide. Sony, for example, uses an inorganic composite that splits into two laminar components with low reflectivity. "Normal" BD-R discs use a composite (or, in the case of BD-RE, a phase-changing alloy) that decreases its reflectivity on recording, i.e. The information below describes the different types of recording layers that may be used on BD-R and BD-RE discs. The calibration is necessary to allow for slight manufacturing defects, greatly reducing or completely eliminating rejected discs and drives, reducing costs and eliminating potential waste.
īD-R has an Optimum Power Calibrations (OPC) / Test Zone, which is used to calibrate (finely adjust) the power of the writing laser before and during writing, and it also has a Drive Calibration Zone (DCZ) at the outer edge of the disc, for optional high speed calibration. Instead of the pits and lands found on prepressed/prerecorded/replicated discs, BD-R and RE discs contain grooves which contain a wobble frequency that is used to locate the position of the reading or writing laser on the disc. 4× BD-RE XL disc (100 GB) US$11 in quantity.4× BD-R XL disc (100 GB) US$5 in quantity.2× double-layer BD-RE disc (50 GB) US$3.15 in quantity.2× single-layer BD-RE disc (25 GB) US$0.82 in quantity.6× double-layer BD-R disc (50 GB) US$1.64 in quantity.10× single-layer BD-R disc (25 GB) CN¥2.04 each in quantity.6× single-layer BD-R disc (25 GB) US$0.42 each in quantity.
#Digistor external blu ray burner verification#
Note: Add extra time for disc verification phase and time for erasing the disc in the case of BD-RE.Īs of April 2018 (approximate pricing): Since BD-RE 5.0/BD-R 4.0, a read speed of 4× is mandatory for UHD support. "Professional Device" added to BD product categories Īs of December 2017, the following speeds are seen in Blu-Ray specifications for R/RE discs: Drive speedġ00GB BR-R(E) XL TL (~33GB/layer) write timeĢ× speeds are mandatory for all formats, with 4× and 6× being optional for non-XL BD-R media.Multi-layered BDAV rewritable/recordable disc with 2× and 4× speeds.BDMV (Blu-ray Disc Movie) application format."Camcorder" added to product categories.
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